Typewriting machine



Dec. 15, 1931. w. F. HELMOND 1,836,117

TYPEWRITING MACHINE Filed Dec. 23. 1927 Patented Dec. 15, 1931 UNITED WILLIAM I7. IIELM0ND, or vzmnrronn, CoNNEC'rICU'r, AssIeNoItv QrofnNDE twooD ELLIOTT FISHER COMPANY, oFjN wYoRI N; Y.,;A CORPORATION OFLDELAWARE- fzrn EwnITING 'IrIJICIIINE Application filed December 23, 1927. s mi Noqzaaozfl ,f t If for typewriter-carriages. c

1 An object is to simplify and reduce theexpense off construction and to provideia factory-assembled' unit attachable to any Under wood machine; j- According to the present invention, a compact vbrake produces a constant; retarding action. The brake includes a simple disk mounted upon a shaft carrying a pinion device which meshes with and raises the carriage-rack from the control of the line-space escapement-mechanism. This disk is pressed by means of a'spring against a friction-disk between it and the face of'abrake-drum at the outer end of'a journal member in which the'shaft is mounted. The spring maintains This invention relates to retardingdevices a constant pressure on the disk and is heldin place by means of a screw in the end of the shaft for holding it in place thereon.

Thebrake is in such anaccessible position in thevtypewriter-frame that the screw may be easily manipulated with a screwidriver to turn it in or out longitudinally of the shaft, so asjtovarythe pressure of the spring and regulate the speed. The brake is very small, but it list efliective in operation for either small or large carriages, andoccupies but very little space. I I

Other features and advantages will herea inafter appear. I c c In the accompanying drawings, Figure 1 is'a sectional elevation of an Underwood typewriting and tabulating machine with a carriage speed-regulator according to the present invention applied thereto; Figure 2 is a perspectiveview of thecarriage speed-regulating -mechani sm, with parts broken away, showing its relation with respect to the co'-operat ing parts of the man W I Figure 3 is a plan View with parts broken away to show the spe'edrreg'ulating mechanism. Figure 4c-is a perspectiveview of the'parts of the speed-regulating mechanism in a disassembled relation. V J The typewriting machine is o'f the regular Underwood construction, of which type-bars 1-1 are swung upwardly by means of the usual type-keys 12 and rearwardlytoprint agairist a cylindrical platen 13, whichrotat'es'bn a" shaft. 14- journaled" in a "platenframei5 mounted in a carriage 16. .The carriage 116 is reoiprocable alongrails 17 supported by theframe 18 of the machine, and a spring d'rum' 19, mounted within the frame, iscon; nected by'meansof a strap 20 fordriving' the carriage from right to left along said rails,

The letter-spacenmovements of the carriage are controlled by the usual'escapement 2'1 which is connected with the carriage means of'a pinion 22 engaging a rack 23. The rack 23 is carried hyarms 2 :Lat each end of the carriage, whereby it maybeswungout of engagement with the pinion 22 tope'rmit the carriage to reciprocate alongthefrailsin dependently of the escapement-me cha nism,

whereby, when the rack is'released from the P n n, the spring-drum will operate to drive ly for tabulating.

- The typewriting machineis provided I tabulating mechanism',, parts "of, an U derwood decimal tabulatori'beingj illustrated.

The tabulator includes aplui'alityof keys25, V

which are operable .to project counterstops 26 into the path of settable stops'27 mountedon arack 28 on the'carriage 16.1 Each of the counter-stops 26 has a I cut-out "portion or shoulder 29' engaging a universal bar 30 the intermediary of a rockt-arm 32 to swing the speed-regulator 34 carrying a [pinion 35 a H mounted on a rock-shaft 31 so that, when a counter-stop is projected, the shaft 31 is rocked and draws downa link 33through time'engages the rack 23 to lift itiout; of en:

gagementiwith the escapement-pinion' 22,.per

mitting the carriage to beldriyen forwaif pby theaforesaid spring-drum "1 9 and connecting strap 20 until a stop 27 isinte'rcepted lby'lth e proieoted-counter-stop 26.: 3 1,

The speed-regulator 34 includes ex tending shaft or stud 38. which,"a s disclosed,

has-one end 39 screw-threaded. engage ment with a socket 40! on the brake casing This shaft is pivotally mounted in bearing 42 extending from the standard 43' cont'ain ing the tabulator counter-stops 26, and is provided with an arm 44 on its other end having pin-and-socket connection with the link 33 whereby, when the link is drawn down, the shaft 38 will be rocked to release the rack 23 from the escapement;pinionl.22.

V Extending forwardly within the machineframe the brake-casing 41 is provided with a shaft-casing 0!:11101111t 45 for the shaft 36.

Easttupon-the shaft' 36 is the': pinion 35, whieh iszff'nota-ted by v the rack' '23 during tabulating operations, and-beyond pinion 35 the antitance...a1ong: shaft (36 for receiving.- a disk =53 andraspring54;each provided with sanaperture 55.correspondingineshape:tothe section of shaft 36land-its end 249, wherebythese members are caused to *rrotate with the shaft but mayhlidlongitudinally thereon. f

S ipring 54 is provided with: a plural-ity of resilient prongs 56 wl1ich :engagetthe disk- 53 tofforcelitlinwardly and itthasanoutwardlyexteniiinggpron g 5 72wliich engages one; ofthe sidesi'58 of. the head 59lofthe.regulatingscrew 51 to, prevent its turning-on.unscrewing-When ithasuonce been adjusted in' position infthe thneadedesocketfiflin the end 149? ofJshaft36. A icollarritio is positioned between shea'dr59 andsspi'inge54: so that the spring willv engage along 'LtheLflattened portion ofithe end x49 I of shaiftl36. andgpermit of:adjustmentinwardly along; the shaft :a distance equal to the length of the lcollan 60,aat which timeQthe head of the -screwflwjllvbe .innengagement withltheouten-len'd oflshaft 36,- thereby limitingtheinwand adjustment of themscrew. ,A.Y .friction V shown'imliigure 14 in their disassembled are rangement readyitolbe "put together. YWhen the pa'rt's are assembled thesdisks .53. andi6l are within the brake-casingAl, the flange 7 64 of which eXten ds to coverthegp eripheral edges iifthese dis'ks', means various,partsaarein positions as .clearly indicated in i, the wother figures of'thelldrawings. v V

g The' brake-casing 4L faces outwardly when the speed regulator 34is in -,position in 7 the frame18 of the.,typewriting machine .an'dzthe regulating. screwl'5l. may betea sily manipulated with a screw-driver so as to vary the compression of th spring 54 against the disks 53 and 61 and face 63 of the brake-casing 41 to adjust the friction between these'parts and thereby regulate the speed at which the typewriterecarriage 16 Willbe permitted toutravel f duringtabidating operations, when the rackbar is engaged by the pinion 35 and is controlled by the speed-regulator.

J'Itwv ill be noted that' 'th-e journal"ormount 45' includes a ffac'e- 63 and= a 'face ts t l site ends thereof; that the action of the -'-spring 54'in 'rot ating with the shaft 36 operates to,.press-the rotating disk 53- towards 'the stationary brake-face 63 and draws the rotatingpinion against. :thestationarya'face 48 of the journal to provide two. rotating-frie tion elements that cof-oipenateto L retard the rotatiomof ethe; rackedri-ven 3 pinion F35 and that the friction -WZtShBf-x or disk;- 61 is L loose on the shaft 36 and will be compressed between lthetrotating disk 53eand-therstationary braking face 063.

45, with thenexcep t-ion rof ,the2 spring-,5 4,-.-are

all [the product of the automation-screw machine .that 's-the assembled .unit includes [2a long shaft tna-nsmission disposed at lright angles to-the traveling .carriage-rack and swingable ,upoma long trunnion bearingflon the 5 mountp-azndn-at right: angles .to otheyshaft, to ushift rthe pinion win a :comparatively 1 straight line into-- co-operation with; theecare riagefeed rack and th at.the factory-assenabled unit 3 is quickly; adjusted; to a r machine by slipping Lth'e rock-shaft 38 through :the

bracket bearingsr 42, and: adjustfingnthe'iarm [44: andthe connection 33, all sthe adjustments being secured with a screwdriver. 1 7 It will be. .understoodthatithe: disk=153may be fast to the sh aft 36, and vthe pinione35 'It will be furtlier1noted* thatlthe retarder may be splined-tolthe 'shaft,and gtheaspring 54 "and adjustments; 51 and. 60 @arranged; at

the spinioneendof the shaft--36.

Variations .may. be resorted ito withi-n :the

scope of ltheinvention, and; portionsof the improvements :may" be used without, others. I IHaving thus described my invention, 1 J claim; v 1.' In;a;typewriting. machine, thecombination with a traveling carriage having ea mak of a .shaft a journalv for :saidshaft, a pinion 1 upon said: shaft; atone cBIId-zOfT'Sarld journal to mesh with said rack, a druinex tending? froml-the rothenendaof s-aid j ourn'al, a friction-brake: including: aedisk MPOIIJSfi/ld shaft to rotate therewith withinsaid -r'drum,

a friction-disk mounted between; the disk on said shaft andlface of, the =drum,a-.- spring upon the souter -lendl of: said-:shaft engaging the disk thereon to press it against said friction-disk and the face of the drum, said disk and spring on said shaft mounted so as to be rotated by the shaft with respect to the drum but movable lon itudinally thereof, said spring consisting 0% a flexible washer having a plurality of resilient inwardly-extending prongs for engaging the disk on the shaft and an outwardly-extend ing prong operable as a holding member,

and a screw in the end of said shaft having its head engaged by said outwardly-extending prong on said spring, said prong normally engaging the head of the screw to prevent it from turning, but yieldable to permit the screw to be adjusted in and out longitudinally of the shaft for operating uopn said spring to increase or diminish its pressure against said disk to adjust the retarding action of said brake, whereby the speed of the carriage controlled by the brake may be regulated.

2. In a typewriting machine, the combination with a traveling carriage having a rack, of a shaft, a journal for said shaft, a pinion upon said shaft at one end of said journal to mesh with said rack, a drum extending from the other end of said journal, a frictionbrake including a disk upon said shaft to rotate therewith within said drum, a friction-disk mounted between the disk on said shaft and the face of the drum, a spring upon the outer end of said shaft engaging the disk thereon to press it against said frictiondisk and the face of the drum, said disk and spring on said shaft mounted so as to be rotated by the shaft but movable longitudinally thereof, a collar slidingly mounted on the end of said shaft beyond said spring so as to maintain the spring in engagement with the shaft, and a screw in the end of said shaft engaging said spring through said collar, said screw being adjustable in and out longitudinally of the shaft,

for operating upon said spring for adjusting the retarding action of the brake, whereby the speed of the carriage controlled by the brake may be regulate WILLIAM F. HELMOND. 

